Acute myeloid leukemia (AML), the most frequent acute leukemia in adults, has been historically treated with infusional cytarabine (ara-c) + daunorubicin (3 + 7) for at least 40 years. The first “target therapy” to be introduced was the monoclonal anti-CD33 gemtuzumab ozogamicin (GO) in 2004. Unfortunately, in 2010 it was voluntarily withdrawn from the market both for safety reasons related to potential liver toxicity and veno-occlusive disease (VOD) and because clinical studies failed to confirm the clinical benefit during induction and maintenance. Seven years later, GO was re-approved based on new data, including insights into its mechanism of action on its target receptor CD33 expressed on myeloid cells. The present review focuses on current biological information and clinical data from several studies investigating GO. Cytogenetic, molecular, and immunophenotypic data are now able to predict the potential positive advantages of GO, with the exception of high-risk AML patients who do not seem to benefit. GO can be considered a ‘repurposed drug’ that could be beneficial for some patients with AML, mostly in combination with new drugs already approved or currently in testing.

Patients with advanced hematological malignancies may experience many troublesome hemorrhagic complications requiring hospitalisation during a palliative home care (HC) program. We report on the feasibility of the management of bleeding at home in patients with haematological malignancies admitted in a domiciliary HC program. The occurrence of a major hemorrhage episode (>1 WHO grade) was registered among 469 patients with hematological malignancies in the terminal phase of their disease followed at home. Number, sites, domiciliary treatment (local hemostatic measures, platelet units, hemostatic drugs, packed red blood cells) and outcome of hemorrhagic complications were evaluated. Out of 469 patients, 123 (26%) experienced a bleeding complication; the overall number of hemorrhagic episodes was 232 (49%) with a median number of 2 episodes per patient. Patients with a platelet count lower than 20 × 10⁹/L (P < 0.00005) or with a diagnosis of acute leukemia or in blast crisis of myeloprolypherative disorders (P < 0.00005) showed a significant higher incidence of hemorrhages than other patients. Resolution of bleeding at home was obtained in 206 (88%) of the 232 episodes; platelet units were transfused at home in 188 (81%) cases. Bleeding was the cause of hospitalisation in four cases. Death occurred in 447 of 469 patients: in 26 of them (6%), it was caused by bleeding complications (11 brain hemorrhage, 2 hematemesis, 3 hemoptysis and 10 melena). In this group of patients, bleeding was a relevant clinical problem However, by implementing a domiciliary palliative care program, home management of hemorrhages proved to be a safe and effective choice.